<template>
  <div class="outer">
    <div class="type-nav">
      <div class="container">
        <div @mouseenter="opnav" @mouseleave="clsnav">
          <h2 class="all">全部商品分类</h2>
          <div class="sort" v-show="show">
            <div class="all-sort-list2" @click="gosearch">
              <div
                class="item"
                v-for="(c1, index) in categoryList"
                :key="c1.categoryId"
                :class="{ cur: curindex == index }"
              >
                <h3 @mouseenter="backg(index)" @mouseleave="outbackg">
                  <a
                    :data-categoryName="c1.categoryName"
                    :data-category1Id="c1.categoryId"
                    >{{ c1.categoryName }}</a
                  >
                </h3>
                <div class="item-list clearfix">
                  <div
                    class="subitem"
                    v-for="(c2, index) in c1.categoryChild"
                    :key="c2.categoryId"
                  >
                    <dl class="fore">
                      <dt>
                        <a
                          :data-categoryName="c2.categoryName"
                          :data-category2Id="c2.categoryId"
                          >{{ c2.categoryName }}</a
                        >
                      </dt>
                      <dd>
                        <em
                          v-for="(c3, index) in c2.categoryChild"
                          :key="c3.categoryId"
                        >
                          <a
                            :data-categoryName="c3.categoryName"
                            :data-category3Id="c3.categoryId"
                            >{{ c3.categoryName }}</a
                          >
                        </em>
                      </dd>
                    </dl>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>

        <nav class="nav">
          <a href="###">服装城</a>
          <a href="###">美妆馆</a>
          <a href="###">尚品汇超市</a>
          <a href="###">全球购</a>
          <a href="###">闪购</a>
          <a href="###">团购</a>
          <a href="###">有趣</a>
          <a href="###">秒杀</a>
        </nav>
      </div>
    </div>
  </div>
</template>

<script>
//引入防抖于节流
import throttle from "lodash/throttle";
import { mapState } from "vuex";
export default {
  name: "TypeNav",
  //组件挂载完毕，可以向服务器发请求
  mounted() {
    //通知vuex发请求，获取数据，存储于仓库中

    if (this.$route.path != "/Home") {
      this.show = false;
    }
  },
  computed: {
    ...mapState({
      categoryList: (state) => {
        return state.Home.categoryList;
      },
    }),
  },
  data() {
    return {
      curindex: -1,
      show: true,
    };
  },
  methods: {
    gosearch(e) {
      let rel = e.target;
      let { categoryname, category1id, category2id, category3id } = rel.dataset;
      if (categoryname) {
        let location = { name: "Search" };
        let query = { categoryName: categoryname };

        if (category1id) {
          query.category1Id = category1id;
        } else if (category2id) {
          query.category2Id = category2id;
        } else {
          query.category3Id = category3id;
        }
        if (this.$route.params) {
          location.params = this.$route.params;
          location.query = query;
          this.$router.push(location);
        }
      }
    },

    backg: throttle(function (index) {
      this.curindex = index;
      if (this.$router.path == "Search") {
        this.curindex = -1;
      }
    }, 50),
    outbackg() {
      this.curindex = -1;
    },
    opnav() {
      this.show = true;
    },
    clsnav() {
      if (this.$route.path != "/Home") {
        this.show = false;
      }
    },
  },
};
</script>

<style scoped>
.outer .type-nav {
  border-bottom: 2px solid #e1251b;
}
.outer .type-nav .container {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  position: relative;
}
.outer .type-nav .container .all {
  width: 210px;
  height: 45px;
  background-color: #e1251b;
  line-height: 45px;
  text-align: center;
  color: #fff;
  font-size: 14px;
  font-weight: bold;
}
.outer .type-nav .container .nav a {
  height: 45px;
  margin: 0 22px;
  line-height: 45px;
  font-size: 16px;
  color: #333;
}
.outer .type-nav .container .sort {
  left: 0;
  top: 45px;
  width: 210px;
  height: 461px;
  position: absolute;
  background: #fafafa;
  z-index: 999;
}
.outer .type-nav .container .sort .all-sort-list2 .item h3 {
  line-height: 30px;
  font-size: 14px;
  font-weight: 400;
  overflow: hidden;
  padding: 0 20px;
  margin: 0;
}
.outer .type-nav .container .sort .all-sort-list2 .item h3 a {
  color: #333;
}
.outer .type-nav .container .sort .all-sort-list2 .item .item-list {
  display: none;
  position: absolute;
  width: 734px;
  min-height: 460px;
  background: #f7f7f7;
  left: 210px;
  border: 1px solid #ddd;
  top: 0;
  z-index: 9999 !important;
}
.outer .type-nav .container .sort .all-sort-list2 .item .item-list .subitem {
  float: left;
  width: 650px;
  padding: 0 4px 0 8px;
}
.outer .type-nav .container .sort .all-sort-list2 .item .item-list .subitem dl {
  border-top: 1px solid #eee;
  padding: 6px 0;
  overflow: hidden;
  zoom: 1;
}
.outer
  .type-nav
  .container
  .sort
  .all-sort-list2
  .item
  .item-list
  .subitem
  dl.fore {
  border-top: 0;
}
.outer
  .type-nav
  .container
  .sort
  .all-sort-list2
  .item
  .item-list
  .subitem
  dl
  dt {
  float: left;
  width: 54px;
  line-height: 22px;
  text-align: right;
  padding: 3px 6px 0 0;
  font-weight: 700;
}
.outer
  .type-nav
  .container
  .sort
  .all-sort-list2
  .item
  .item-list
  .subitem
  dl
  dd {
  float: left;
  width: 415px;
  padding: 3px 0 0;
  overflow: hidden;
}
.outer
  .type-nav
  .container
  .sort
  .all-sort-list2
  .item
  .item-list
  .subitem
  dl
  dd
  em {
  float: left;
  height: 14px;
  line-height: 14px;
  padding: 0 8px;
  margin-top: 5px;
  border-left: 1px solid #ccc;
}
.outer .type-nav .container .sort .all-sort-list2 .item:hover .item-list {
  display: block;
}
.cur {
  background-color: blue;
}
</style>
